There are Time to Love 1 - Weekend in Smallville and Time to Love 2: First Days in Metropolis . I don't know if they count because they are from a series, but they are the only long fics I remember where Lois doesn't find out the truth.

Andreia


"My wife's love is what unites Krypton and Earth in my heart. Without it, without her, I truly would be in hell."

~ Superman: Man of Tomorrow #15